CN-121738557-B - Multidimensional detection and quantitative evaluation method for fault fracture zone water damage grouting treatment effect

CN121738557BCN 121738557 BCN121738557 BCN 121738557BCN-121738557-B

Abstract

The invention discloses a multi-dimensional detection and quantitative evaluation method for a water damage grouting treatment effect of a fault fracture zone, which comprises the steps of constructing a three-dimensional hydrogeological model of the fault fracture zone containing a water-rich core zone, a water guide channel and water pressure distribution, forming a three-dimensional monitoring network covering the water damage risk zone of the fault fracture zone, monitoring and obtaining basic parameters at corresponding points of measuring points, normalizing the basic parameters by adopting an extremum standardization method, calculating parameter index weights by coupling an improved analytic hierarchy process and a water management parameter sensitivity analysis method, calculating standardized water management, physical and mechanical parameters to obtain a water blocking efficiency index, a grouting body-rock mass cooperative integrity index and a water stability safety index, and calculating an effect grade by adopting a comprehensive index formula of space risk correction for judging the treatment effect. According to the method, the problem that the traditional unified threshold cannot be adapted to the differential risk scene is solved by strictly setting the evaluation standard for the high risk area.

Inventors

PENG SHILONG
ZHANG JUNFENG
LIN JIAN
HUANG ZHEN
WU YUN
LIU YANG
XU YANMEI

Assignees

安徽建筑大学

Dates

Publication Date: 20260505
Application Date: 20260302

Claims (5)

1. A multi-dimensional detection and quantitative evaluation method for the treatment effect of fault fracture with water damage grouting is characterized by comprising the following steps: s1, constructing a three-dimensional hydrogeologic model of a fault fracture zone containing a water-rich core zone, a water guide channel and water pressure distribution, and arranging measuring points in the geologic area of the model to form a three-dimensional monitoring network covering the water hazard risk zone of the fault fracture zone; s2, obtaining basic parameters through drilling water level monitoring at actual point positions corresponding to the model measuring points; S3, normalizing the basic parameters by adopting an extremum standardization method, and coupling and calculating the corresponding index weight of the basic parameters by adopting an improved analytic hierarchy process and a water system parameter sensitivity analysis method; S4, calculating through standardized water physical parameters, physical parameters and mechanical parameters to obtain a water shutoff efficiency index Slip casting-rock mass synergistic integrity index Safety index of water stability ; S5, based on 、、 Calculating an effect grade by adopting a comprehensive index formula of space risk correction, and judging the water damage grouting treatment effect of the fault fracture zone; the coupling formula in the step S3 is as follows: In the formula, Is the first The comprehensive weight of the item index is calculated, For the subjective weight of the analytic hierarchy process, Is the sensitivity weight of the water-based parameter, Is a weight adjustment coefficient; Before index weight coupling calculation in the step S3, the water system parameter, the physical parameter and the mechanical parameter are respectively standardized according to a specified index type, and are used for normalizing the water system parameter, the physical parameter and the mechanical parameter to a [0,1] interval, wherein: Dividing the water system parameter, the physical parameter and the mechanical parameter into an optimal efficiency type index and a suppression type index according to the association relation between the parameter value and the evaluation target, wherein the optimal efficiency type index comprises a post-grouting head difference Filling rate of grouting material Longitudinal wave velocity after grouting The fracture closure degree, the compression strength of rock mass and the compression strength of grouting body, wherein the inhibition and control indexes comprise water inflow after grouting Permeability coefficient after grouting Maximum strain of rock mass after grouting And post-grouting strain rate; The optimal index and the inhibition index are respectively processed according to the following standardization: Wherein, the As the raw data is to be processed, 、 Respectively the maximum value and the minimum value of the index; the sensitivity weight of the water quality parameter in the step S3 The calculation formula of (2) is as follows: Wherein, the Is the osmotic coefficient variation; is the index variation; In the step S4, water shutoff efficiency indexes for comprehensively quantifying the treatment effect of grouting on water damage are respectively established Slip casting-rock mass synergistic integrity index And a water stability safety index considering the cooperative safety of water pressure and rock deformation Wherein: index of water shutoff efficiency The method comprises the following steps: In the formula, As the weight of the water inflow decay term, 、 The water inflow amount of unit length before and after grouting is respectively, 、 The permeability coefficients before and after grouting are respectively; Establishing a grouting body-rock mass collaborative integrity index by fusing sonic wave velocity and grouting body filling rate The method comprises the following steps: In the formula, As the weight of the longitudinal wave velocity increase rate, 、 Longitudinal wave velocities of rock mass before and after grouting are respectively, The filling rate of the volume of the grouting body is; Establishing a water stability safety index considering cooperative safety of water pressure and rock mass deformation The method comprises the following steps: In the formula, Is the weight of the water head difference ratio, 、 The water head difference before and after grouting is respectively, For maximum strain of the rock mass after grouting, Allowing limit strain for the rock mass, and taking values according to lithology classification; The specific calculation process for calculating the effect level by using the comprehensive index formula for spatial risk correction in the step S5 includes: Based on the coupling risk assessment logic of water pressure and water inflow, establishing a water damage risk correction coefficient to strengthen the high risk area evaluation weight, and aiming at the detection point Is a water damage risk correction coefficient The calculation formula of (2) is as follows: In the formula, As a coefficient of the risk balance, Is the detection point Is used for the initial water pressure of the (a), For the water inflow amount per unit length before grouting, For a maximum initial water pressure in the region, The maximum initial water inflow for the zone; Based on the water damage risk correction coefficient, integrating the multidimensional index to form a unified decision basis, and establishing a comprehensive effect index The method comprises the following steps: In the formula, Is the first The comprehensive weight of each core evaluation index exists 、、 In turn, the index of water shutoff efficiency Weight, grouting-rock mass co-integrity index of (2) Weight and water stability safety index of (2) Is used for the weight of the (c), Is the first The core evaluation index of each of the plurality of the cores, 、、 Expressed as water shutoff efficiency index in turn Slip casting-rock mass synergistic integrity index And water stability safety index 。
2. The multi-dimensional detection and quantitative evaluation method for the treatment effect of the water damage grouting of the fault fracture zone of claim 1, wherein the three-dimensional hydrogeological model is initially constructed based on advanced geological forecast data in the construction process of the step S1, and a horizontal hydrographic drilling water inflow or water pressure test is combined to determine the trend of a water-rich core area, a transition area and a water guide channel in the model; the acquisition source of the advanced geological forecast data is set to be at least one of seismic wave detection, geological radar, infrared water detection and horizontal hole detection methods; the water-rich core area is set to be an area with water inflow not less than a preset value A or water pressure not less than a preset value B; the water inflow limit value A 'and the water pressure limit value B' are preset, and the transition zone is set to be a zone in which the water inflow is set in a preset value range A 'to A and the water pressure is set in a preset value range B' to B.
3. The method for multidimensional detection and quantitative evaluation of water damage grouting treatment effect of fault fracture zone as claimed in claim 2, wherein the three-dimensional monitoring network of the broken zone water damage risk zone of step S1 comprises a plurality of measuring points, the measuring points are located in grouting holes and in-hole detection holes and used for synchronously collecting water, physical and mechanical parameters, wherein: the water-rich core area adopts grids to carry out radioactive point position arrangement, the point position interval is less than or equal to 1m, and drilling holes are arranged in a plum blossom shape; Gradient arrangement is carried out in the transition zone according to water pressure and water inflow, the point position distance is set to be 1-3m, at least one group of ring measuring points are arranged at each 0.2MPa water pressure, and finally a three-dimensional monitoring network for grouting bodies and surrounding rock bodies is formed.
4. The method for multidimensional detection and quantitative evaluation of the treatment effect of the fault broken belt water damage grouting according to claim 3, wherein the basic parameters in the step S2 include a water management parameter, a physical parameter and a mechanical parameter, and are acquired through three-dimensional monitoring network acquisition, wherein: The water management parameter comprises water inflow Coefficient of penetration And head difference Water gushing amount in the water management parameters Monitoring and obtaining water inflow in unit length before and after grouting by adopting weir measuring method 、 The permeability coefficient The osmotic coefficient before and after grouting is obtained through calculation of a drilling three-stage hydraulic pressure water pressure test 、 The head difference Monitoring water level change of drilling holes before and after grouting by adopting a water level gauge with specified precision and calculating water head difference before and after grouting 、 Obtaining; the physical parameter comprises the filling rate of the grouting body Wave velocity of longitudinal wave And fracture closure, the grouting body filling rate The longitudinal wave velocity is obtained by detecting the electromagnetic wave reflection difference inversion calculation of the grouting body and the rock mass The detection method adopts a single-hole or cross-hole acoustic wave method, and concretely comprises longitudinal wave velocity before and after grouting 、 The method is used for calculating the wave velocity lifting rate, and the fracture closure degree is obtained by inverting the fracture closure degree calculation based on a correlation model of the wave velocity and the fracture density; The mechanical parameters comprise rock mass strain and compressive strength, and the rock mass strain is used for monitoring the maximum strain of the rock mass after grouting through a distributed optical fiber And calculating the strain rate, wherein the compressive strength is obtained by calculating the uniaxial compressive strength of the rock mass and the grouting body through drilling coring test and is used as a stability evaluation supplementary parameter.
5. The method for multidimensional detection and quantitative evaluation of the treatment effect of water damage grouting of fault fracture according to claim 1, wherein the specific judgment criteria for judging the treatment effect of water damage grouting of fault fracture in the step S5 are as follows: If it is The effect is judged to be excellent; If it is The effect is judged to be good; If it is Judging the effect as a qualified grade; If it is The effect is determined to be a failure level.

Description

Multidimensional detection and quantitative evaluation method for fault fracture zone water damage grouting treatment effect Technical Field The invention relates to the technical field of underground construction data processing, in particular to a multidimensional detection and quantitative evaluation method for a water damage grouting treatment effect of a fault fracture zone of an underground engineering. Background When underground engineering (tunnels, roadways and the like) passes through a fault fracture zone, a water-rich broken rock body is easy to form a water guide channel, water damage such as water burst, mud burst and the like is caused, the safety of construction personnel is seriously threatened, and great economic loss is caused, and the grouting technology can synchronously realize water blocking and reinforcing, so that the grouting technology is often the core preferred technology for treating the water damage, wherein the grouting treatment effect directly relates to water damage prevention and treatment success and failure, so that scientific detection and evaluation are very important, and multiple requirements of water blocking up to standard, rock body reinforcing and long-term stability are verified, thereby providing basis for subsequent engineering decisions. At present, detection technology after grouting treatment of fault water damage of underground engineering (tunnel, roadway and the like) mainly comprises four types: Firstly, the drilling coring method can visually observe the compactness of the grouting body, but belongs to point type detection, the representativeness is poor, the drilling can damage a grouting curtain, a new water seepage channel can be possibly induced, and the integral water shutoff effect cannot be reflected; Secondly, by a geophysical prospecting method (such as geological radar and acoustic wave test), geology Lei Dayi is interfered by the water content of a rock mass and a metal member, the accuracy of identifying water shutoff of deep small cracks is low, the acoustic wave test can only reflect the integrity of the rock mass, and core hydrodynamic parameters such as water inflow, water pressure and the like are difficult to quantify, and the water shutoff efficiency cannot be directly related; Thirdly, a water management parameter test method (such as a pressurized water test and water inflow monitoring), wherein the pressurized water test belongs to a local destructive test, has a limited test range, is difficult to cover a full-treatment area, and the water inflow monitoring can only reflect a macroscopic water shutoff effect and can not position local leakage points and grouting weak areas; fourthly, a mechanical parameter testing method (such as strain monitoring and strength testing) is adopted, the short-term mechanical response of the multi-focus rock mass is neglected, the stability attenuation under the long-term action of water pressure is ignored, the water blocking effect cannot be synchronously associated, and the double evaluation requirements of water blocking and stability are difficult to meet. Furthermore, these techniques and corresponding evaluation methods are also subject to the general disadvantages: 1) Gravity light water management, focusing on mechanical indexes such as rock mass strength, neglecting core hydrodynamic parameters such as water inflow, water pressure and the like, and easily treating and invalidating 'grouting is compact but still water seepage'; 2) Index singleization, dependence on a single detection technology, is insufficient in representativeness or is easy to interfere, and cannot reflect the synergistic effect of water shutoff and rock integrity; 3) The quantification is insufficient, a quantification evaluation method is lacked, the evaluation result depends on experience judgment, and the optimization of the grouting supplement scheme is difficult to guide. In summary, the existing method is mostly single geophysical prospecting or drilling coring, is not suitable for the dynamic situation of water-rock cooperation of water-rich faults, has the problems of single index evaluation on one side, weight depending on experience, no consideration of risk difference, unsmooth connection of detection, evaluation and treatment and the like, and causes inaccurate judgment of treatment effect, improper evaluation of a risk area, and inappropriateness of a grouting supplement scheme and decision scientificity. Therefore, the application provides a multi-dimensional detection and quantitative evaluation method for the treatment effect of the fault fracture grouting with water damage, which can improve the comprehensiveness, quantification and engineering suitability of evaluation so as to solve the technical problems. Disclosure of Invention Aiming at complex conditions of water enrichment, high water pressure and crack development of fault fracture zones of underground engineering (tunnels, roadways and the li